IgG

Test Code

IGGT

Quest Code

543

CPT Codes
82784

Preferred Specimen

1 mL serum

Patient Preparation
Overnight fasting is preferred

Minimum Volume

0.5 mL

Transport Container

Serum separator tube (SST)

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 90 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic

Methodology
Immunoturbidimetric

Setup Schedule

Mon-sat

Report Available

3-6 days

Reference Range

Cord Blood

600-1600 mg/dL

1-28 days

250-600 mg/dL

1-3 months

200-600 mg/dL

4-6 months

160-590 mg/dL

7-11 months

160-800 mg/dL

1 year

280-1040 mg/dL

2 years

330-1120 mg/dL

3-5 years

390-1360 mg/dL

6-8 years

440-1470 mg/dL

9-11 years

480-1530 mg/dL

12-16 years

500-1590 mg/dL

17-60 years

600-1640 mg/dL

≥61 years

600-1540 mg/dL

Clinical Significance

Increased IgG is associated with acute and chronic inflammations, monoclonal IgG myeloma, autoimmune diseases; decreased IgG is found in selective IgG deficiency, Bruton's Disease, and acquired immune deficiency.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.